Finding the Third Proportional to 1,369,584 and 2,780,640

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369,584 : 2,780,640 = 2,780,640 : x
2. Step 2: Convert to fraction form
   1,369,584/2,780,640 = 2,780,640/x
3. Step 3: Cross multiply
   1,369,584x = 2,780,640 × 2,780,640
4. Step 4: Simplify right side
   1,369,584x = 7,731,958,809,600
5. Step 5: Solve for x
   x = 7,731,958,809,600/1,369,584
6. Step 6: Final answer
   x = 5,645,479.80